<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <a href="heading.html" target="">heading</a>
    <ul>
        <li><a href="https://example.com">Website</a></li>
        <li><a href="mailto:m.bluth@example.com">Email</a></li>
        <li><a href="tel:+123456789">Phone</a></li>
    </ul>
</body>

</html>